Air-heating fireplace



Jan. l, 1929.

i J. w. CORNELIUS AIR HEATING FIREPLAGE Filed Jan. 5, 1928 Inventor d WCorlze/zzs By f,

Patented Jan. 1, 1929..

f *uit regatas JESSE W.'COR1\TELIUS, OF BIRMINGHAM, ALABAMA. i

, AIR-HEATING rInnPLAcE.

applicati@ ieairanu'apy 5, 1928.V serial No. 244,755.

This invention relates to fireplaces especially designed 'and adapted for'the heating of air so as to enable warm air to be conducted to other rooms or to distant points in single casting having heat radiatingribs on engagement with the 'l the top of the cast its air contacting surfaces and adapted at its ends to be embedded in the side walls of the fireplace, therebyl being very simply and economically installed. Y

A further distinctive feature of my invention relates to the construction lof lthe baflie employed, lthe same being preferably a galvanized iron sheet bent to extend in spaced relationship under the back hearth and upwardly approximately midway between the fire back and the chimney to a oint near the iron fire ack, thereby providing a reverse bend which vwill direct the entering cold air upwardly against the top of the fire back and then downwardly along its ribbed surface and then inwardlyy `under the back hearth to to the hot air duct. Y

My invention contemplates eliminating'vthe back bric-k entirely in the fireplace back and relying upon the cast iron fire back to form the bottomand back wallsand to deline'the throat of the fireplace, the fire back extending horizontally from the throat to its point of i back chimney wall.A

My invention further contemplates the the point of delivery i provision of a reversible blower so that the air can be both forced into the house through f the fireplace heater in cold wea-ther and can be drawn out of the house in warm weather, and it also contemplates taking the air from the outside or from theenclosed basement as may be most desirable. l

Having these and other objects in view, my invention will be best understood by reference to the accompanying drawings which tothis baffle I mount a cast illustrate only what I consider the preferred embodiment of my invention. e

Y In the drawings Fig. 1 is a vertical through a' fireplace and l air heatingf apparatus installed. Fig. 2 is a detail View of the cast iron fire of Fig. 1, showing its ribbed V surface and the manner .of its tie-in into? the side walls 4.of the fireplace.

While itA is' to be understood that my in-'I vention is capable of various modic'ations, according toiwhether it is installed'in new chimneys or adapted to old ones and accordf ing to the duty contemplated of it, neverthe-Y less to those skilled in the art a. clear under-v standing ofthe principles governing the con# struction and operation of my apparatus will be had from the accompanying' description.

In the drawings, I show a chimney 3 formed with an airduct 4- opening at its bottom into the outer air or into-thebasement and .extending to the hearth level. Thel fireplace is formed with the customary offset brick side walls 5, supports the mantel 6 and connects with the chimney flue 7 In new construction the outer Wall of the duct 4L is carried straight up to a point near the top level of the fireplace opening' and the inner wall of the duct cross-"sectional view chimney showing iny K' back and back hearth taken on the line IIkII y terminates below the level ofthe hearth 8 suf-I ficientlyto provide space for an air duct 9` between the back hearth and the bottom horizontal leg 10 of a sheet metall baffle. The leg 10 has side flanges 102L and extends fromthe inner edge of the hearth tothe inner wall of the air duct l where it joinsthe unflanged extends on a gradual v upright leg 16 which inward curve toa point near the top Ylevel of the fireplace opening.

iron element preferably of unitary structure, comprising a back hearth portion tion 12, the latter overhang the grate define the throat 14. This lire back 1-2 carries a horizontal top portion 15 which extends back to and is tied into the chimney in the same manner that the side edges of hearth 11 and fire back 12 are tied into the side walls 5 of curving inwardly so asto `the fireplace. The parts 10, 16, 11 and 12 with the outer wall of the chimney define a reverse bend heating passage comprising the upflow In spaced relation i 11 and a curved fire back por- 13 and at its upper edge to where one or more registers ing plant without in the fireto heat the room 1n which the fireplace is located.l The one piecev duct 17, connecting below with the duct 4, and the downflow duct 18 connecting above with the duct 17 and below with the duct 9. The

lire back and back hearth casting are preterably provided with heat radiating ribs 19 eX- is mountedar reversible type 'fan' 26 driven bv a reversible motor 27. y

'Having installed the apparatus in the'rn anner described and it being understood that the flue 21 may lead to any desired point yare desired, the

operation of the apparatus is as follows. A fire is built in the `grate 22 and in the usual manner radiates its heat tothe room., As soon as the back hearth 11 andthe fire back 12 become hot, the fan 2G is started up in a direction to force air upwardly through the duct 4 and with a reverse fiowthrough the ducts 17, 18 and 9, and in this flow it becomes highly heated by contact with the elements 11, 12, 15 and 19 andis delivered Vas hot air through flue 21 to the register 23.with its volume controlled by fire back from becoming over-y air keeps the that would heated and absorbs surplus heat otherwise be wasted up the flue.

15 preventsundesirable disturbance byr eddies with'the draft of the fireplace and be comes highly heated from the products ofV through the throat 14. The entering air current implnges against this;

combustion escaping plate 15 and then flowsparallel with and between the vribs i9 along down the fire back and under thetback hearth so that the device constitutes an exceedingly efficient air heatany manner disturbing the efticiency of cast iron fire back andback hearth avoids any danger vof sparks or ashes getting into the adjustment of thev yregister or by the regulation of thel fan. i The The flat top the air duct and in eliminating fire brick it provides a most economic improvement in the iireplaceproper. l

Though I have described with great particularity the details of the embodiment of the inventionV herein shown, it is not to be construed that l am limited thereto, as

.changes inlarrangement and substitution of equivalents may be made by those slzilledin thel art without departing from the invention v as defined in the' appended claims.

Having thus described my invention, lwhat y l' I clann as new and desire to secure byLetters Patent, is

1. lnan air heating fireplace, the combination with an integral inetal casting 'iorming a bach hearth and fire back,

being bent forwardly to form a heat absorbing surface,a bafie dividing the space behindy the fireback intoconnecting up and' down-` flow ducts and bent forwardly to forni ahori- Zontal outlet duct in cooperation'withi the back hearth, means to y through said' ducts, and an outlet lduct leading from the downflcw duct under 'thebaCl hearth and delivering into a hot air flue, as and for the purposes described, t' y 2. an air Yheating `fireplace comprising brick side walls, a cast iron back hearth and tire back, vboth spaced from` the back lbrick Work and embedded in the side bricltworlr, a"

sheet metal baffle rising to a point near the top of the space behind the fire backl to defineV an upflow and a downflow duct-and bent'f'orwardly beneath the baclhearth to ormthere withr a horizontal outlet duct, a forced feed air supply ductconnecting with rthe upfiow duct, and a house heating hot lairI flue connected to the outlet duct.

3. An air heating fireplace as set forthin` claim 1 inwhich the firebacl; carries vertical ribs extending into the downflow duct.

4. An air heatingv fireplace according to1 claim 2, in whichA the casting forming the backv hearth and fire back is' provided with ribs exposedto the `air current 'to be heated in the downflow and rdischarge ducts and extendingV from the top of theback wall to the front end of the back hearth. y

In testimony whereof I, Jnssn 1V. NELIUs, affix my signature.

Jnssn w. conunnius; v

said fire back force an air current 

